/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.pvm.internal.cmd;

import java.util.Map;

import org.jbpm.api.JbpmException;
import org.jbpm.api.ProcessInstance;
import org.jbpm.api.cmd.Environment;
import org.jbpm.pvm.internal.client.ClientExecution;
import org.jbpm.pvm.internal.session.DbSession;

/**
 * @author Tom Baeyens
 */
public class SignalCmd extends AbstractCommand<ProcessInstance> {
  
  private static final long serialVersionUID = 1L;

  protected String executionId;
  protected String signalName;
  protected Map<String, ?> parameters;

  public SignalCmd(String executionId, String signalName, Map<String, ?> parameters) {
    if (executionId==null) {
      throw new JbpmException("executionId is null");
    }
    this.executionId = executionId;
    this.signalName = signalName;
    this.parameters = parameters;
  }

  public ProcessInstance execute(Environment environment) throws Exception {
    ClientExecution execution = null;
    
    DbSession dbSession = environment.get(DbSession.class);
    execution = dbSession.findExecutionById(executionId);
    if (execution==null) {
      throw new JbpmException("execution "+executionId+" does not exist");
    }
    
    execution.signal(signalName, parameters);
    
    return execution.getProcessInstance();
  }
}
